Final answer:
Malignant melanoma is the rarest and most deadly skin cancer developing from melanocytes, squamous cell carcinoma arises from the epidermis's squamous cells, and basal cell carcinoma, the least aggressive type, originates in the basal cells. Melanoma spreads to other organs, while basal and squamous cell carcinomas are generally less aggressive.
Step-by-step explanation:
To match the type of skin cancer with its description:
- Malignant melanoma is a cancer characterized by the uncontrolled growth of melanocytes, the pigment-producing cells in the stratum basale of the epidermis. It usually develops from a mole and is the most fatal form of skin cancer due to its high likelihood of metastasizing and spreading to other organs. Melanomas are typically asymmetrical with uneven borders and a raised surface. Treatment often includes surgical excision and immunotherapy.
- Squamous cell carcinoma is a form of skin cancer that arises from the squamous cells, which make up most of the epidermis. This type of carcinoma can metastasize but is generally not as aggressive as melanoma. It may appear as scaly red patches, open sores, or warts.
- Basal cell carcinoma is the most common and typically the least aggressive form of skin cancer. It originates in the basal cells at the bottom of the epidermis and usually presents as a translucent bump with blood vessels that are often visible. If caught early and treated, it's usually curable.
In summary, basal cell and squamous cell carcinomas start in the same sublayer of the epidermis, namely the stratum basale. Malignant melanoma can spread to other organs and is the type of skin cancer that is most likely to do so. A mole is not inherently cancerous; however, melanoma can develop from moles.